cvs commit: src/sys/cam/scsi scsi_da.c src/sys/dev/usb umass.c usbdevs

[Florent Thoumie]

On Tuesday 31 January 2006 06:33, Matthew Jacob wrote:
> >> Linux only sends the SYNCHRONIZE_CACHE command if the WCE (Write Cache
> >> Enable) bit of the disk is set. I can't seem to find something
> >> equivalent to this in our CAM framework. I have no particular SCSI
> >> knowledge but I guess I can have a look at this tomorrow.
> >>
> >> I'm forwarding this to freebsd-scsi@ (keep me CC'ed, as I'm not
> >> subscribed to this list, yet).
> >
> > Hmm, is WCE part of the inquiry response?  [moving to scsi@ list]
>
> Yes.

Hum, reading Linux source and SCSI standard [1], I'm not so sure, but I might 
be wrong. We need to request the caching page in scsi_mode_sense_{6,10}.

I'll try to write something today, but I guess someone having already worked 
on scsi will only need 10 minutes to DTRT.

[1] http://www.danbbs.dk/~dino/SCSI/SCSI2-09.html (table 156)

-- 
Florent Thoumie
flz at FreeBSD.org
FreeBSD Committer
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